Modelling Monochamus galloprovincialis dispersal trajectories across a heterogeneous landscape to optimize monitoring by trapping networks

The pine wood nematode (PWN) is an invasive species which was introduced into Europe in 1999. It represents a major economic and ecological threat to European forests. In Europe, the maritime main host Monochamus galloprovinciallis its only vector. Our goal analyze effect of landscape heterogeneity on vector’s dispersal. We further aimed at developing new method locate origin insects captured systematic network pheromone traps. A mark-release-recapture experiment carried out heterogeneous combining plantations, clear-cuts isolated patches broadleaved mixed forests southwest France. Least-cost path analysis used model dispersal trajectories assign friction values each land-use type landscape. trap’s geographical coordinates, capture levels mean neighbouring calculate weighed barycentre position release marked beetles. Least Cost Path modelling revealed tendency avoid habitat such as or deciduous not clear-cuts. weighted greatly improved when surrounding land-uses were used. study demonstrates value applying ecology concepts methods improve our understanding prediction pest invasion processes. practical application design grids traps infection focus from PWN vectors originate newly colonized area.